Lifting-jack



(No Model.)

H. GORTNER.

LIFTING JA K. v No. 400,205. Patented Mar. 26, 1889.

, 0 /fla ANMRQ l HENRY GORTNER, OF NElV ALBANY, OHIO.

LlFTlNG-JACK.

SPECIFICATION forming part of Letters Patent No.400,205, dated March 26, 1889.

Application filed July 10, 1888. Serial No. 279,565. (No model.)

To aZZ whom it may concern:

Be it known that I, HENRY GORTNER, a citizen of the United States, residing at New Albany, in the county of Franklin and State of Ohio, have invented new and useful Improvements in Lifting-Jacks, of which the following is a specification.

The invention relates to improvements in lifting-jacks; and it consists in the construction and novel combination of parts hereinafter described, illustrated in the accompanying drawings, and pointed out in the appended claims.

In the drawings, Figure l is a perspective view of a lifting-jack embodying the invention. Fig. 2 is a central vertical section on line 00 0c of Fig. 1. Fig. 3 is avertical section at right angles to that shown in Fig. 2. Fig. i is a plan view of the improved jack.

Referring to the drawings by letter, A designates the main frame, composed of two similar side frames, B B, having the opposite guide-slots b b, and connected by bolts or otherwise at their lower ends to the horizontal base-block G, which has the outstanding extension 0 on one side.

D is a transverse bar connecting the two frames B above the guide-slots b.

E is the lifting-frame, having the head e to rest under the article to be raised, and the uprights c, with a space or slot, 6 between them, which space registers with the guideslots 1). The uprights e are located, respectively, between the corresponding bars of the frames B.

The bar D is rectangular in cross-section, and fits nicely between the uprights e of the lifting-frame. rectangular in cross-section, secured to the outer bar or upright, e, and with its ends resting in the guide-slots b of the frames B, in which slots it moves smoothly. By means of the bar D, the guide-slots, and the foot-block the lifting-frame is guided vertically and prevented from getting out of alignment.

G G are two similar opposite parallel swingin g standards pivoted at their lower ends upon opposite sides of the extension 0, and H is a lever pivoted near its inner end between the upper ends of said standards. The said lever has secured to its upper edge, above and F is a transverse foot-block,

inward from its pivotal point, the bearingplate I, bent on itself and having the transverse rod '0' in the bend at its inner edge.

J J are S-shaped link-bars, having their upper'ends journaled on the ends of the rod c'and their lower ends on a transverse rod, K, that passes through the bearing-slots and through a rectangular block, L, that travels in said slots, and which is provided with perforations Z, at right angles to said slots.

M is a pin, attached by a cord,-m, to a staple, m, secured to the outer edge of the outer bar, 6', of the lifting-frame, and adapted to pass through openings N in said bars, and through registering-perforations Z in the block L. By means of the said perforated block, the pin, and the openings N in the lifting-frame the latter can be adjusted to various heights to adapt itself to wagon bodies or other things that it is desired to lift. The sigmoid link-bars J by having their upper ends bent downward and their lower ends bent upward, cause the pressure on the journals of the rods 2' K to act at all times nearly vertically, so that there is little or no composition of motion. The lever H consequently raises the block L almost vertically, and, besides the power saved by the nearly-vertical lift, the said block is prevented from binding in the guide-slots b and thereby producing friction, which would obstruct the motion of said block and lessen the power of the machine. When the lever H is completely or nearly depressed, the upper ends of the link-bars G stand somewhat inward in relation to theirlower ends or slightly nearer the frames B. Consequently the pressure of any weight upon the top orhead of the lifting-frame causes the latter to be held up more firmly.

Having described my invention, I claim 1. In a lifting-jack, the combination of the main frame composed of two parallel side frames provided with guide-slots, the liftingframe arranged between the said side frames and provided with blocks extending into the said guide-slots, and the pivoted lever H, conprovided with. a toot-block, i which extends i into the guitflwslots h, the guide-block L, ads i justably Connected to the lifting-frame and extending into the guide-slots, and the piv oted lever ll, etmneeted by suitable links to the bloelc L, substantially as described.

3. In a lilfting iaelt, the eoinbination, with i the main frame eon'iposed of side frames, l3, provided with guide-slots h 1) and connected 1 near their upper ends by the transverse bar l), of the liftii'ig-franie arranged between the 5 frames 13 13 and provided with a longitudinal slot, 6 registering with the slots 7) and slidl in; on the bar I), the adjustable bar L, arl ranged in the slot and provided with a sei ries of peiilforations, 7, adapted to register with perforations .I\' in the sliding frame, the removable pin M, ei'iga'ig'ing' the said registering apertures, and the pivoted lever connected by suitable links to thebloek ll, substantially as specified.

r11. In a llfblIIg-jittk,ijlle main trai'ne A\ C()lnposed of the slotted side frames, 13 B, which are arranged on a suitable base, and conneeted by a transverse bar, l), in eoniliiination with the lifting-frame l), provided, with a slot, 1

(f embracing the bar 1), and having a footbar, l extending into the slots of the side frames, the adjustable block L, arrai'ig'ed in the slot and held in place by a pin, M, en-

i gaging registering apertures in the lifting trame and the block L, the pivoted lever ll,

and the S-shaped orsignioid links J, eonneeting the lever to the opposite ends of the bar l), substantially as speeitiml.

5. in a 1i;tting-, 'ael the main frame provided. with opposite guide'slots b b, and the liftingpfraine mounted in the main frame and provided. with slots extending into the guideslots, in combination with the swinging stand ards G, pivoted to the base of the main frame, the lever pivoted between the upper ends of the standards, and the S-shaped or sigmoid lin ks eonncajvting the leverto the liftingfranie, substantially as specified.

1n testi mony thatI claim the foregoing as my own I have hereto affixed my sig'i'iature in presence of two Witnesses.

HENRY (wOR'JNE'R. Witnesses:

Ill II. DEWITT, TSAAU N. snrrn. 

